Symptoms

ssh, scp or sftp to a node that doesn't appear in DNS or /etc/hosts file is slow to make initial connection. After the connection is established, the speed is as expected. There are two cases to consider, see below. Note that in most environments this issue will not occur since IPs will be in /etc/hosts or DNS.

Changes

This is more likely to happen in newly installed test and production environments as DNS or hosts configuration might not be complete yet. Inherently the similar problem may be seen with Oracle VM configurations along with the guest OS installations.

Cause

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